Shear Strength Anisotropy of Natural Granite Residual Soil

doi:10.1061/(ASCE)GT.1943-5606.0002709

	Shear Strength Anisotropy of Natural Granite Residual Soil
	Liu, Xinyu 2,3; Zhang, Xianwei 3; Kong, Lingwei 3; Yin, Song 1; Xu, Yiqing 2,3
刊名	JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
	2022
卷号	148 期号:1 页码:13
关键词	Granite residual soil Strength anisotropy Hollow cylinder torsional shear Sample preparation Effective friction angle Quantitative evaluation
ISSN号	1090-0241
DOI	10.1061/(ASCE)GT.1943-5606.0002709
英文摘要	A significant feature of residual soil is the presence of a cemented structure and fissures that dominate its anisotropic behavior. Although the anisotropy of some sedimentary soils is well understood, that of residual soils is not. The present study investigates the strength anisotropy of granite residual soil via undrained hollow cylinder torsional shear tests for which intact and remolded hollow cylinder specimens were sheared in various principal stress directions alpha. The results reveal significant shear-strength anisotropy of the natural soil, whereas the remolded soil behaved almost isotropically. Expressed using the effective stress ratio at ultimate state t/s', the shear-strength variation reached 51% for alpha=0-90 degrees, within which range the highest values of t/s' was that for alpha=0 degrees. The torsional shear mode (alpha=45 degrees) resulted in the lowest soil strength. The anisotropic behavior of the studied soil differs much from that of some normally consolidated sedimentary soils such that new parameters are proposed for evaluating the degree of anisotropy. The proposed parameters confirmed the marked strength anisotropy of intact granite residual soil and found the anisotropy degree of soil significantly reduced after being remolded. This study provides the most direct evidence to date for the strength anisotropy of natural granite residual soil and enhances the understanding of this soil and weathered geomaterials in general. (C) 2021 American Society of Civil Engineers.
资助项目	National Natural Science Foundation of China[41972285] ; National Natural Science Foundation of China[41672293] ; National Natural Science Foundation of China[51709290] ; Youth Innovation Promotion Association CAS[2018363] ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection[SKLGP2020K024] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[Z0190202] ; CRSRI Open Research Program[CKWV2021884/KY] ; Science Fund for Distinguished Young Scholars of Hubei Province[2020CFA103]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ASCE-AMER SOC CIVIL ENGINEERS
WOS记录号	WOS:000719533900019
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28250]
专题	中科院武汉岩土力学所
通讯作者	Zhang, Xianwei
作者单位	1.Zhongyuan Univ Technol, Sch Architectural Engn, Zhengzhou 450007, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xinyu,Zhang, Xianwei,Kong, Lingwei,et al. Shear Strength Anisotropy of Natural Granite Residual Soil[J]. JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING,2022,148(1):13.
APA	Liu, Xinyu,Zhang, Xianwei,Kong, Lingwei,Yin, Song,&Xu, Yiqing.(2022).Shear Strength Anisotropy of Natural Granite Residual Soil.JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING,148(1),13.
MLA	Liu, Xinyu,et al."Shear Strength Anisotropy of Natural Granite Residual Soil".JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING 148.1(2022):13.